Nannaria tenuis, Means & Hennen & Marek, 2021

Means, Jackson C., Hennen, Derek A. & Marek, Paul E., 2021, A revision of the minor species group in the millipede genus Nannaria Chamberlin, 1918 (Diplopoda, Polydesmida, Xystodesmidae), ZooKeys 1030, pp. 1-180: 1

publication ID

http://dx.doi.org/10.3897/zookeys.1030.62544

publication LSID

lsid:zoobank.org:pub:48997D3B-9B4E-4348-8F30-0C8E8672569A

persistent identifier

http://treatment.plazi.org/id/8280982C-467A-4445-B146-53014CFAB831

taxon LSID

lsid:zoobank.org:act:8280982C-467A-4445-B146-53014CFAB831

treatment provided by

ZooKeys by Pensoft

scientific name

Nannaria tenuis
status

sp. nov.

Nannaria tenuis   sp. nov. Figs 63 View Figure 63 , 64 Vernacular name: "The Svelte Twisted-Claw Millipede" View Figure 64

Material examined.

Holotype: United States - Virginia • ♂; Bland Co., 1.0 km southeast of Bastian ; 37.1453°N, - 81.1417°W; elev. 728 m; 2 Feb. 2016; hand collected; J. Means, P. Marek, T. Price leg.; VTEC MPE00990 View Materials . GoogleMaps  

Paratype: United States - Virginia • ♀; Bland County, 1.6 km southeast of Bastian ; 37.1407°N, - 81.1394°W; elev. 797 m; 15 Jan. 2016; hand collected; J. Means, P. Marek, V. Wong, T. Price leg.; VMNH MPE00925 View Materials GoogleMaps   .

Other material.

United States - Virginia • 1 ♂; Bland county , in gully, side of hill, by creek near power line; 37.1537°N, - 81.1450°W; elev. 712 m; 8 Feb. 2016; hand collected; J. Means, P. Marek, T. Price, Kyle leg.; VTEC MPE00991 View Materials GoogleMaps   3 ♀♀; Bland County; 37.1193°N, - 81.1357°W; elev. 874; 1 Apr. 2016; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01087 View Materials GoogleMaps   -89 • 1 ♀; Bland County; 37.1184°N, - 81.1360°W; elev. 861 m; 1 Apr. 2016; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01095 View Materials GoogleMaps   1 ♂; Bland County; 37.1159°N, - 81.1363°W; elev. 890 m; 1 Apr. 2016; hand collected; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01086 View Materials GoogleMaps   1 ♂; Bland County; 37.1149°N, - 81.1347°W; elev. 864 m; 1 Apr. 2016; hand collected; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01106 View Materials GoogleMaps   1 ♀; Bland County; 37.1134°N, - 81.1339°W; elev. 842 m; 1 Apr. 2016; hand collected; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01109 View Materials GoogleMaps   1 ♀; Bland County; 37.1200°N, - 81.1360°W; elev. 894 m; 7 Apr. 2016; hand collected; J. Means, P. Marek, A. Prewitt, Tyler, Renea leg.; VTEC MPE01115 View Materials GoogleMaps   1 ♀; Bland County; 37.1218°N, - 81.1356°W; elev. 889 m; 7 Apr. 2016; hand collected; J. Means, P. Marek, A. Prewitt, Tyler, Renea leg.; VTEC MPE01114 View Materials GoogleMaps   1 ♂; Bland County; 37.1234°N, - 81.1355°W; elev. 889 m; 7 Apr. 2016; hand collected; J. Means, P. Marek, A. Prewitt, Tyler, Renea leg.; VTEC MPE01111 View Materials GoogleMaps   2 ♀♀; same collection data as preceding; VTEC MPE01112 View Materials GoogleMaps   , 1113 • 1 ♂; Bland County, off AT down from the road; 37.1369°N, - 81.1372°W; elev. 939 m; 20 May 2016; hand collected; J. Means, P. Shorter, D. Krall leg.; VTEC MPE01319 View Materials GoogleMaps   1 ♀; same collection data as preceding; VTEC MPE01320 View Materials GoogleMaps   1 ♂; Bland County, small creek with forest on either side, gully; 37.1449°N, - 81.1412°W; elev. 748 m; 20 May 2016; hand collected; J. Means, P. Shorter, D. Krall leg.; VTEC MPE01317 View Materials GoogleMaps   1 ♀; same collection data as preceding; VTEC, MPE01318 View Materials GoogleMaps   . For detailed collection data see Suppl. material 7   .

Diagnosis.

Adult males of Nannaria tenuis   sp. nov. are distinct from other Nannaria   and the sympatric N. aenigma   , based on the following combination of characters: Gonopods. Gonopodal acropodite gently curving medially before apex, distal zone curving dorsomedially, with caudally directed tip, not medially directed as in N. ignis   sp. nov. Tip rounded with small lateral flange (Fig. 63A View Figure 63 , red arrow), not thin and serpentine, lacking flanges as in N. aenigma   . Acropodite with medial swelling before apex, not simple as in N. ignis   sp. nov. and N. aenigma   . Telopodite basal zone thin and elongate, > 1/3 length of acropodite, not ca. 1/4 length of acropodite as in N. ignis   sp. nov., or ca. 1/6 length as in N. aenigma   . Prefemur with dorsomedially curving prefemoral process, not serpentine, curving ventrally and bending cephalo-laterally at tip as in N. ignis   sp. nov., or straight, acicular as in N. aenigma   . Prefemoral spine reduced to slight swelling at base of prefemoral process (Fig. 63C View Figure 63 , red triangle), not large, projected as in N. ignis   sp. nov. Color. Tergites with orange paranotal spots (Fig. 64 View Figure 64 ). Black background. Dorsum of collum smooth with caudal orange margin.

Measurements.

♂ holotype (VTEC, MPE00990): BL = 30.6, CW = 4.1, IW = 2.4, ISW = 0.9, B11W = 5.1, B11H = 3.3; ♀ paratype ( VMNH, MPE00925): BL = 35.4, CW = 3.9, IW = 2.6, ISW = 1.0, B11W = 5.1, B11H = 3.6.

Variation.

No known variation.

Distribution.

Known only from southwestern Virginia (Virginia: Bland County; Suppl. material 7; Fig. 126 View Figure 126 ). The distribution of N. tenuis   sp. nov. is restricted to the area just southeast of Bastian, Virginia. Distribution area: < 1 km2; status: MRE.

Ecology.

Individuals of N. tenuis   sp. nov. were collected in winter and spring from mesic broadleaved forests, were found under hardwood leaf litter, and were occasionally beneath 1-2 cm of soil. Two individuals, including the female holotype, were found under ca. 7 cm of snow when temperatures were below freezing, suggesting that there ostensibly exists some cold tolerance in Nannaria   .

Etymology.

This species is named for its strikingly thin telopodite basal zone. The specific name is an adjective derived from the Latin tenuis, meaning thin.

Type locality.

United States, Virginia, Bland Co., 1.0 km southeast of Bastian; 37.1453°N, - 81.1417°W.